fixed bug in attributes handling

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
added cursor getters from text ; added cursor support in styles

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
improved tests

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
added user id setting in authors module

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
improved changesets + tests

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
simplified get_author_idx

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
updated buildout configuration

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
updated changeset support ; updated tests

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>
fixed initial user id setting

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>